From the cross A b c / a B C × a b c / a b c, how many double crossovers would be expected out of 1000 progeny?

The map of a chromosome interval is:

A——10 m.u.——B——40 m.u.——C


A) 5
B) 10
C) 20
D) 40
E) 80


D) 40

Biology & Microbiology

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